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Start free with EleplanKAT6-related intellectual disability-craniofacial anomalies-cardiac defects syndrome
ORPHA:457193Malformation syndrome
Also called Arboleda-Tham syndrome · KAT6A syndrome
What it is
A rare genetic neurodevelopmental disorder characterized by global developmental delay (DD) and variable degrees of intellectual disability (ID) with delayed or limited/absent speech development associated with neonatal hypotonia, feeding difficulties, cardiac anomalies and dysmorphic facial features, predominantly broad nasal tip and thin, tented upper lip. Microcephaly, frequent infections, gastrointestinal and/or ocular anomalies have also been described.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy, Neonatal
- Inheritance
- Autosomal dominant
- Classified as
- Malformation syndrome
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
10Common30–79%
19- Atrial septal defect
- Cerebral visual impairment
- Craniosynostosis
- Downturned corners of mouth
- Epicanthus
- Feeding difficulties
- Gastroesophageal reflux
- Growth delay
- Microretrognathia
- Muscle stiffness
- Neonatal respiratory distress
- Patent ductus arteriosusDiagnostic criterion
- Plagiocephaly
- Posteriorly rotated ears
- Ptosis
- Seizure
- Short stature
- Strabismus
- Ventricular septal defect
Sometimes5–29%
10- Brachydactyly
- Cleft palate
- Cryptorchidism
- Dystonia
- Hydronephrosis
- Intestinal malrotation
- Lacrimal duct stenosis
- Laryngomalacia
and 2 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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